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Note 8 - Employee Benefit Plans | 12 Months Ended
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Dec. 31, 2018
Notes to Financial Statements |
Compensation and Employee Benefit Plans [Text Block] | 8. Employee Benefit Plans We maintain a defined contribution employee retirement plan, which includes a 401 (k) option, under which all employees are eligible to participate. We match a specified percentage of employee contributions, subject to certain limitations. For the years ended December 31, 2018, 2017, and 2016, our matching contributions to the plan were $19.7 million, $16.7 million, and $15.6 million, respectively. We have a nonqualified deferred compensation plan that allows eligible employees to defer a portion of their compensation. The compensation deferred under this plan is credited with earnings or losses on investments elected by plan participants. Each participant is fully vested in all deferred compensation and earnings; however, these amounts are subject to general creditor claims until actually distributed to the employee. A participant may elect to receive deferred amounts in one payment or in quarterly installments payable over a period of 2 to 25 years upon reaching age 55, having 15 years of service, or becoming disabled. Our total liability under this plan was $15.7 million as of December 31, 2018, and $16.4 million as of December 31, 2017. These amounts are included in other long-term liabilities in our Consolidated Balance Sheets. Participant withholdings are held by a trustee and invested in equity securities as directed by participants. These investments are classified as trading securities and recorded at fair value. Realized and unrealized gains and losses are recognized currently in earnings. The investments are included in other assets in our Consolidated Balance Sheets and totaled $15.7 million as of December 31, 2018, and $16.4 million as of December 31, 2017.

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- Definition The entire disclosure for an entity's employee compensation and benefit plans, including, but not limited to, postemployment and postretirement benefit plans, defined benefit pension plans, defined contribution plans, non-qualified and supplemental benefit plans, deferred compensation, share-based compensation, life insurance, severance, health care, unemployment and other benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 712 -URI http://asc.fasb.org/topic&trid=2197446 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -URI http://asc.fasb.org/topic&trid=2127225 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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